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Home My WebLink About12090001.10Specifications for Small Construction Site Controls 1. Preexisting vegetation shall be retained on idle portions of the building lot for as long as construction operations allow. Clearing shall be done so only active working areas are bare. 2. Temporary seed and /or mulch shall be applied to areas, such as stockpiles and rough graded areas, that are bare and not actively being worked. This shall apply to areas that will not be reworked for 21 days or more. 3. Stockpiles created from basement excavation and grad- ing shall be situated away from streets, swales, or other waterways and shall be seeded and/or mulched immedi- ately. 4. Silt fence or other sediment barriers shall control sheet flour runoff from the building lot. These shall not be constructed in channels or areas of concentrated flow. Other sediment controls such as sediment traps and rj� 'yV i P III(II r • - Soil Stock- . - inlet protection shall also be used as needed to control sediment runoff. Sediment control practices shall be inspected weekly after storm events, and maintained in good working condition. 5. Construction vehicle access shall be limited to one route, to the greatest extent practical. The access shall be gravel or crushed rock underlain with geotextile. 6. Mud tracked onto streets or sediment settled around curb inlet protection shall be removed daily or as needed to prevent it from accumulating. It shall be removed by shoveling and scraping and shall NOT be washed off paved surfaces or into storm drains. Sediment removed shall be placed where it will not be subject to erosion or concentrated runoff. n Q Temporary seeding and /or mulch applied to rough graded areas Construction Entrance gravel Rough grade areas to allow settling below grade elevation Storm Drain wArilet protection ® Storm Drain without inlet protection Yard Drain wi inlet protection Silt Fence Curb EROSION EEL 18" 18" Specifications for Geotextile Inlet Protection Geotextile over Wire Mesh Backing 2" x 4" Frame \ SECTION 1. Inlet protection shall be constructed either before upslope land disturbance begins or before the inlet becomes functional. 2. The earth around the inlet shall be excavated completely to a depth at least 18 inches. 3. The wooden frame shall be constructed of 2 -inch by 4 -inch construction grade lumber. The 2 -inch by 4 -inch posts shall be driven one (1) it into the ground at four corners of the inlet and the top portion of 2 -inch by 4 -inch frame assembled using the overlap joint shown. The top of the frame shall be at least 6 inches below adjacent roads if ponded water will pose a satety hazard to traffic. 4. Wire mesh shall be of sufficient strength to support fabric with water fully impounded against it It shall be stretched tightly around the frame and fasteners securely to the frame. a. Geotextile material shall have an equivalent opening size of 20 -40 sieve and be resistant to sunlight It shall be stretched tightly around the frame and fastened securely. It shall extend from the top of the frame to 18 inches below the inlet notch elevation. The geotextile shall over- lap across one side of they inlet so the ends of the cloth are not fastened to the same post 6. Backfill shall be placed around the inlet in compacted 6- inch layers until the earth is even with notch elevation on ends and top elevation on sides. 7. A compacted earth dike or check dam shall be con- shucted in the ditch line below the inlet if the inlet is not in a depression. The top of the dike shall be at least 6 inches higher than the top of the frame. Specifications for Construction Entrance (Not To Scale) 70 ft. (or 30ft for Access to Individual House Lot) 14ft Minimum • Not Less i of Ingress or • Fa ,1 T PROFILE Right of Way Diversion as Needed 18" or Sufficient of Divert Runoff J Road or Other Existing Paved Surface Culvert as Needed Specifications for Geotextile - Stone Inlet Protection for Curb Inlets 2' Min storm Drain Wire C.... �vntaYtila Rock PLAN VIEW ♦. w+•+r +w rt tCp�t 1�.• + +1 )•1 +�••�P +•�•• _�► f± FYI }t f:� � r ► � �.'�`i AAA �.+.•.•..,,C-. 'fit. a'._. _ _ • _ I c1 Screen ELEVATION rj1NP.Yenn,nl }at.: V• • w w w W w w a • i w w ♦ . w i i w w w w w w w w � • w w • w �/ w W W w w w w • w w w w ISOMETRIC Wire & geotextile must lay flat against curb Specifications for Geotextile -Stone Inlet Protection for Curb Inlets 1. Inlet protection shall be constructed either before upslope land disturbance begins or before the inlet becomes functional. 2. Construct a wooden frame of 2- by -4 -in. construction - grade lumber. The end spacers shall be a minimum of 1 ft. beyond both ends of the throat opening. The anchors shall be nailed to 2- by -4 -in, stakes driven on the opposite side of the curb. 3. The wire mesh shall be of sufficient strength to support fabric and stone. It shall be a continuous piece with a minimum width of 30 in. and 4 ft. longer than the throat length of the inlet, 2 ft. on each side. 4. Geotextile cloth shall have an equivalent opening size (EOS) of 20 -40 sieve and be resistant to sunlight. It shall be at least the same size as the wire mesh. Specifications for 5. The wire mesh and geotextile cloth shall be formed to the concrete gutter and against the face of the curb on both sides of the inlet and securely fastened to the 2- by -4 -in. frame. 6. Two -inch stone shall be placed over the wire mesh and geotextile in such a manner as to prevent water from entering the inlet under or around the geotextile cloth. 7. This type of protection must be inspected frequently and the stone and /or geotextile replaced when clogged with sediment. Construction Entrance 1. Stone Size -ODOT # 2 (1.5 -2.5 inch) stone shall be used, or recycled concrete equivalent. 2. Length -The Construction entrance shall be as long as required to stabilize high traffic areas but not less than 70 ft. (exception: apply 30 ft. minimum to single residence lots). 3. Thickness -The stone layer shall be at least 6 inches thick for light duty entrances or at least 10 inches for heavy duty use. 4. Width -The entrance shall be at least 14 feet wide, but not less than the full width at points where ingress or egress occurs. 5. Geotextile -A geotextile shall be laid over the entire area prior to placing stone. It shall be composed of strong rot -proof polymeric fibers and meet the following specifications: Figure 7.4.1 Geotextile Specification for Construction Entrance Minimum Tensile Strength 200 Ibs, Minimum Puncture Strength 80 psi. Minimum Tear Strength 50 lbs. Minimum Burst Strength 320 psi. Minimum Elongation 20% Equivalent Opening Size EOS < 0.6 mm. Permittivity 1 x10 -3 cm /sec. 6. Timing -The construction entrance shall be installed as soon as is practicable before major grading activities. 7. Culvert -A pipe or culvert shall be constructed under the entrance if needed to prevent surface water from flowing across the entrance or to prevent runoff from being directed out onto paved surfaces. 8. Water Bar -A water bar shall be constructed as part of the construction entrance if needed to prevent surface runoff from flowing the length of the construction entrance and out onto paved surfaces. 9. Maintenance -Top dressing of additional stone shall be applied as conditions demand. Mud spilled, dropped, washed or tracked onto public roads, or any surface where runoff is not checked by sediment controls, shall be removed immediately. Removal shall be accomplished by scraping or sweeping. 10. Construction entrances shall not be relied upon to remove mud from vehicles and prevent off -site tracking. Vehicles that enter and leave the construction -site shall be restricted from muddy areas. 11. Removal -the entrance shall remain in place until the disturbed area is stabilized or replaced with a permanent roadway or entrance. !!!!III J Q W D} C'6 U) W H F. c) Oz ZQ a U) a V) F_ U w F_ 2 V) U0�f r� O Q � • W cn > 0�f w w Z Z SCALE: AS NOTE[ DATE: OCTOBER 2( JOB NO.: 4 DESIGN: ` DRAWN: CHECKED: SHEET NC 6OF6